The AFL have confirmed the start time for next Saturday afternoon's second preliminary final between Richmond and GWS at the MCG.

The match will start at 4.45pm AEST.

The clash has been scheduled in the twilight time slot in order to allow for the Giants to fly home after the match, and return to Sydney on Saturday night.

Friday night's first preliminary final between Adelaide and Geelong will begin at 7.50pm AEST at the Adelaide Oval.